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From Computer History Wiki
GNU Bourne-Again SHell
Perhaps one of the most famous programs from the GNU project.
Contents
Version 1
In the early days...
Version 2
More mainstream, and starting to get Linux central.
Version 3
Version 4
The newest version of the popular shell is 4.3, introduced February 2014. Patch level 4.3.30 was relased in November 2014. Beta 4.4 was released in October 2015.
